Constrained Preferential Bayesian Optimization and Its Application in Banner Ad Design

• URL: http://arxiv.org/abs/2505.10954v1
• Date: Fri, 16 May 2025 07:41:07 GMT
• Title: Constrained Preferential Bayesian Optimization and Its Application in Banner Ad Design
• Authors: Koki Iwai, Yusuke Kumagae, Yuki Koyama, Masahiro Hamasaki, Masataka Goto,
• Abstract summary: We propose constrained preferential Bayesian optimization (CPBO), an extension of PBO that incorporates inequality constraints for the first time.<n>Our technical evaluation shows that our CPBO method successfully identifies optimal solutions by focusing on exploring feasible regions.<n>We also present a designer-in-the-loop system for banner ad design using CPBO, where the objective is the designer's subjective preference, and the constraint ensures a target predicted click-through rate.
• Score: 11.765166377922723
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Preferential Bayesian optimization (PBO) is a variant of Bayesian optimization that observes relative preferences (e.g., pairwise comparisons) instead of direct objective values, making it especially suitable for human-in-the-loop scenarios. However, real-world optimization tasks often involve inequality constraints, which existing PBO methods have not yet addressed. To fill this gap, we propose constrained preferential Bayesian optimization (CPBO), an extension of PBO that incorporates inequality constraints for the first time. Specifically, we present a novel acquisition function for this purpose. Our technical evaluation shows that our CPBO method successfully identifies optimal solutions by focusing on exploring feasible regions. As a practical application, we also present a designer-in-the-loop system for banner ad design using CPBO, where the objective is the designer's subjective preference, and the constraint ensures a target predicted click-through rate. We conducted a user study with professional ad designers, demonstrating the potential benefits of our approach in guiding creative design under real-world constraints.

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